We have the LF fridge phonics. DD1 received them as a gift around age 2. Currently DD1 (11mos) is fascinate with them and the fridge farm. She's constantly putting them in her mouth. They are large and as PP said, the magnet(s) housed within the plastic so no choking hazard...that I can tell.
Mom to two amazing DDs ('07 & '09) and a fur baby.
Gluten free since Nov '11 after non-celiac gluten sensitive diagnosis. Have had great improvement or total elimination of: migraines, bloating/distention, heartburn, cystic acne, canker sores, bleeding gums, eczema on elbows, dry skin and scalp, muscle cramps, PMS, hair loss, heart palpitations, fatigue. I'm amazed.